* {
  padding: 0;
  margin: 0;
  list-style: none;
  box-sizing: border-box;
}

.box {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.box header {
  height: 300px;
}

.box header .one {
  column-count: 3;
}

.box header .one ul {
  column-count: 3;
}

.box header .one ul li {
  width: 160px;
  text-align: center;
  height: 40px;
  line-height: 40px;
  background-color: #fff;
  margin: 20px 10px;
  border-radius: 50px;
  border: 1px solid black;
}

.box header .one .active {
  background-color: #1E6FFF;
  color: #fff;
}

.box main {
  flex: 1;
  height: 100%;
  overflow-y: scroll;
}

.box main .two ul li {
  display: flex;
}
